Overview

• HVO scientists say the next summit outburst could arrive within days and would be the 31st episode since December.
• Two vents in Halemaʻumaʻu are actively fountaining and activity remains confined to the crater, though recent bursts have been lower as a widening vent eases pressure.
• USGS sensors tracking earthquakes and subtle ground tilt allow only short-range forecasts of days to a week, and scientists cannot yet say how or when the sequence will end or shift.
• A lower magma chamber beneath the crater is being replenished at roughly 5 cubic yards (3.8 cubic meters) per second, feeding the episodic behavior, HVO reports.
• Recent episodes have typically lasted 10 to 12 hours, with three USGS livestreams available as park officials urge visitors to follow safety guidance for gas, ash and windborne volcanic glass.